kernel/exec_domain.c

   1 /*
   2  * Handling of different ABIs (personalities).
   3  *
   4  * We group personalities into execution domains which have their
   5  * own handlers for kernel entry points, signal mapping, etc...
   6  *
   7  * 2001-05-06   Complete rewrite,  Christoph Hellwig (hch@infradead.org)
   8  */
   9
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/kmod.h>
  13 #include <linux/module.h>
  14 #include <linux/personality.h>
  15 #include <linux/proc_fs.h>
  16 #include <linux/sched.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/syscalls.h>
  19 #include <linux/sysctl.h>
  20 #include <linux/types.h>
  21 #include <linux/fs_struct.h>
  22
  23 #ifdef CONFIG_PROC_FS
  24 static int execdomains_proc_show(struct seq_file *m, void *v)
  25 {
  26         seq_puts(m, "0-0\tLinux           \t[kernel]\n");
  27         return 0;
  28 }
  29
  30 static int execdomains_proc_open(struct inode *inode, struct file *file)
  31 {
  32         return single_open(file, execdomains_proc_show, NULL);
  33 }
  34
  35 static const struct file_operations execdomains_proc_fops = {
  36         .open           = execdomains_proc_open,
  37         .read           = seq_read,
  38         .llseek         = seq_lseek,
  39         .release        = single_release,
  40 };
  41
  42 static int __init proc_execdomains_init(void)
  43 {
  44         proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
  45         return 0;
  46 }
  47 module_init(proc_execdomains_init);
  48 #endif
  49
  50 SYSCALL_DEFINE1(personality, unsigned int, personality)
  51 {
  52         unsigned int old = current->personality;
  53
  54         if (personality != 0xffffffff)
  55                 set_personality(personality);
  56
  57         return old;
  58 }